If I correctly understand your question, you're wondering whether a class action suit could be filed on behalf of francophones. I think the best way would be to support our umbrella organization, the Fédération des communautés francophones et acadienne du Canada, the FCFA. It files submissions with the government on behalf of francophones—of all those francophone communities—to assert their language rights more effectively.
On November 26th, 2020. See this statement in context.